Separator for storage batteries



Patented July 1, 1924?.

m sr a. s

rannnnrx w. FRAHM, or Los ANGELES, cemronm.

f SEPABATOR FOR STORAGE BATTERIES.

- No Drawing.

To all whom it concernr Be, it known that I, FREDERICK W.

. F RAHM, a citizen of the United States, re-

sidin at Los Angeles, in the county of Los l Ange es and State of California, have invented new' and useful Improvements in Separators for Storage Batteries, of which the following is a specification.

My invention relates to *separators for storage batteries, to compositions for use in the maln'ng of the same, and to the art of preparin such compositions. The primary object o my present invention is the'pro-' duction of separators for storage batteries which shall be relatively indestructible, highly eflicient in use, and capable of production by simple means and at a moderate cost.

. vantageous to use three parts asbestos to' two parts of coarse sawdust, by weight,

preferably mixing the asbestos and the saw-' dust before associatin the solution of rubber therewith. It wi be understood that a degree of porosity isv indispensable to lates of this character, and that this porosity is obtained by the mentioned use of coarse sawdust associated with asbestos.

. It will be understood by those skilled in the .art that minor changes "in the ingrename'to this specification.

dients and proportions thereof are ossible without departing from the spirit 0 "my invention as indicated herein and by the apthe liquids within storage Application filed December 1, 1922. Serial No. 804,426.

pended claims, and that when the mixture as been prepared as above, it should be subjected to pressure and thereafter vulcanized in a usual manner; I prefer to-provide no perforations or corrugations in my sepa rator plates, but I find it advantageous to form them in such molds as will provide vertical channels or grooves therein, these channels tending to increase the surface of the plates and at-the same time contribute to their rigidity.

What I claim is: v v 1.. -A separator for storage batteries comprising rubber, asbestos and sawdust.

.. 2. A separator for storage batteries comprising rubber, asbestos and sawdust, the

sawdust and asbestos being present in ap proximately the ratio of three parts asbestos to two parts of sawdust, by weight.

3. A separator for storage batteries comprising rubber, asbestos and sawdust, the

sawdust and asbestos being present in, approximately the ratio of three parts asbestos to two parts of sawdust,.by weight, and the whole belng thereafter pressed to the desired form and then vulcanized.

4. Theprocess of preparing separators for storage batteries which comprises mixing asbestos with sawdust, adding suflicient of a solution of rubber to render these materials plastic, moldingthe same and thereafter for storage batteries which comprises mix-.,

ing asbestos with sawdust in approximately the proportion of three parts of asbestos to two parts of sawdust,.adding suflicient-of a solution of rubber to render these materials plastic, moldin the same in forms adapted not having vertical grooves an therea rvulcanizing;

In testimony. whereof I have signed my FREDERICK w, ,i i 

